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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

37681 results found.

  1. GRB 160804A: VLT/X-shooter redshift
  2. GRB 160804A: SAO RAS optical observations
  3. GRB 160804A: TNG optical observations, afterglow fading and candidate host galaxy
  4. GRB 160804A: Fermi GBM observation
  5. GRB160804A: MASTER-SAAO observation
  6. Konus-Wind observation of GRB 160802A
  7. IPN Triangulation of GRB 160802A
  8. GRB 160804A: Swift-BAT refined analysis
  9. GRB 160804A: Swift/UVOT Detection
  10. GRB 160804A: Swift-XRT refined Analysis
  11. GRB 160804A: Enhanced Swift-XRT position
  12. GRB 160804A: Swift detection of a burst
  13. GRB 160802A: Lomonosov BDRG gamma ray detection
  14. GBM Observations of IceCube 160731
  15. GRB 160801A: TSHAO optical observations
  16. GRB 160801A: Swift/UVOT Upper Limits
  17. GRB 160801A: SAO RAS optical observations
  18. GRB 160802A: Fermi GBM detection
  19. GRB 160801A: NOT upper limits
  20. GRB 160726A: CALET Gamma-Ray Burst Monitor detection
  21. GRB 160801A: Swift-XRT refined Analysis
  22. GRB 160801A: Swift-BAT refined analysis
  23. GRB 160801A: Enhanced Swift-XRT position
  24. GRB 160801A: MITSuME Okayama upper limits
  25. GRB 160801A: Swift detection of a burst
  26. GRB 160716A: TAROT La Silla observatory optical observations
  27. GRB160720A: Astrosat CZTI detection
  28. GRB160709A: Astrosat CZTI detection of short GRB
  29. GRB160703A: Astrosat CZTI detection
  30. GRB 160705B: 15 GHz upper limits from AMI
  31. GRB 160703A: 15 GHz upper limits from AMI
  32. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  33. GRB 160726A, Swift-BAT refined analysis
  34. Konus-Wind observation of short GRB 160726A
  35. GRB 160726A: Fermi GBM observation
  36. GRB 160726A: Swift detection of a short burst
  37. GRB 160721A: CALET Gamma-Ray Burst Monitor detection
  38. GRB 160720A CALET Gamma-Ray Burst Monitor detection
  39. GRB 160720A: Lomonosov BDRG gamma ray detection and MASTER limit
  40. Konus-Wind observation of GRB 160720A
  41. IPN Triangulation of GRB 160720A
  42. GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.
  43. GRB 160720A: Fermi GBM detection
  44. Fermi GBM trigger 490701713/160720418 is not a GRB
  45. Fermi GBM trigger 490365157/160716523 is not a GRB
  46. GRB 160716A: Swift/UVOT Detection
  47. GRB 160714A: Swift/UVOT Upper Limits
  48. GRB 160716A: Swift-BAT refined analysis
  49. GRB 160716A: Swift-XRT refined Analysis
  50. GRB 160716A: Enhanced Swift-XRT position
  51. GRB 160716A: Swift detection of a burst
  52. Swift Trigger 704327: KAIT Optical Observations
  53. GRB 160712A: Swift-BAT refined analysis
  54. GRB 160714A: TAROT Calern observatory optical observations
  55. GRB 160714A: Swift-XRT observations
  56. GRB 160623A: afterglow spectroscopy by GTC and independent redshift determination
  57. GRB 160714A: Fermi GBM observation
  58. GRB 160623A: optical astrometry, photometry, and redshift
  59. Fermi GBM trigger 490193747/160714539 is not a GRB
  60. GRB 160714A: Swift-BAT refined analysis,
  61. Swift Trigger 704327: MASTER syncronous optical observations
  62. GRB 160714A: MASTER early optical observations
  63. GRB 160712A: Further GROND observations
  64. GRB 160709A CALET Gamma-Ray Burst Monitor detection
  65. Swift Trigger 704327: a possible GRB
  66. GRB 160714A: Optical observations from OSN
  67. GRB 160714A: Swift-XRT observations
  68. GRB 160714A: Swift detection of a short burst
  69. GRB 160712A: Swift/UVOT Upper Limits
  70. GRB 160712A: RATIR Optical and NIR Observations
  71. Konus-Wind observation of GRB 160712A
  72. GRB 160712A: GROND observations
  73. GRB 160712A: Swift-XRT refined Analysis
  74. GRB 160712A: Skynet R-COP observations
  75. GRB 160712A: Enhanced Swift-XRT position
  76. GRB 160629A: 15 GHz detections and upper limits from AMI
  77. GRB 160624A: 15 GHz upper limits from AMI
  78. GRB 160712A: Initial Swift/UVOT observations
  79. GRB 160712A: Swift-XRT observations
  80. GRB 160712A: Global MASTER-Net optical observation
  81. GRB 160712A: Swift detection of a burst
  82. GRB 160625B: Global MASTER-Crimea prompt optical emission detection (fwd)
  83. GRB 160709A: MASTER early imaging Swift BAT error box
  84. GRB 160709A, Swift-BAT detection and localization
  85. GRB 160625B: TSHAO optical observations
  86. GRB 160709A: Swift-XRT observations
  87. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  88. Konus-Wind observation of GRB 160709A (short/hard)
  89. GRB 160709A: Fermi GBM Observations
  90. GRB 160709A: Fermi-LAT detection
  91. GRB 160709A: Tiled Swift observations
  92. Fermi GBM trigger 489771293/160709649 is not a GRB
  93. GRB 160705B: TAROT Calern observatory optical observations
  94. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  95. GRB 160629A: Mondy optical observations
  96. GRB 160629A: AbAO optical observations
  97. GRB 160703A: Keck-I/LRIS Optical Observations
  98. Konus-Wind observation of GRB 160702A (short/hard)
  99. IPN Triangulation of GRB 160702A (short/hard)
  100. SGR 1935+2154: CALET Gamma-Ray Burst Monitor detections

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